It is estimated that 70% of medical decisions rely on laboratory results, and mistakes in interpreting these results can cause unnecessary treatments, patient anxiety, and avoidable complications. To tackle this, a Secure Medical Laboratory Test Results System was proposed in this study to allow patients to access their results easily from home/work. The system was designed using Unified Modeling Language (UML), with a responsive front end built using JavaScript and React, and a backend powered by PHP. MySQL safely stores user credentials and medical laboratory test data, which were protected with AES-256 encryption. Evaluation of the system shows that encryption took 3 to 20 milliseconds, and decryption took 3.2 to 20.7 milliseconds, showing the system handles large data quickly without slowing hospital workflows. Software Quality evaluations were excellent, with scores of 98% for functionality, 97% for performance, 96% for usability, 92% for reliability, 95% for security, and 85% for compatibility. These results demonstrate that the system is secure, dependable, and easy to use, offering an effective way to manage sensitive medical information